Rubber-covered roll.



Patented July 4, 1911.

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UNITED STATES PATENT oEEIcE.

IRA F. BURNHA'M'., OF STOUGHTON, MASSACHUSETTS, ASSIGNOR TO STOUGHTON RUBBER COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

RUBBER-COVERED Roni..

Specification of Letters Patent.

Patented July 4, 1911.

To all whom it may concern:

Be it known that I, IRA F.' BURNHAM, a citizen ofthe United States, and a resident of Stoughton, county of Norfolk, State of Massachusetts, have inventedv certain new and useful Improvements in Rubber- Covered Rolls, of which the following is a full, clear, and exact disclosure.

My invention relates particularly to rubber covered rolls used in wool washing machines where they vare subjected to heavy pressures and strains.

I do not wish to be understood as being limited to rolls that are used for this particular purpose, for my improved roll may be utilized wherever rubber covered rolls are used in the various arts.

The object of my invention is to produce a roll which has a practically continuous homogeneous surface, which isy less likely to become worn and which may be easily repaired or renewed, should it become dama e v For a detaildescription of several forms of my invention which I at present deem preferable, 'reference may be had to the following specification and to the accompanying drawings, forming a part thereof, in which- Figure l isa view in elevation showingparts of the rubber portion of the roll cut away in 'order to disclose the fastening means; Fig. 2 is a transverse sectional view of the roll, taken on the line 2--2 Fig. 1; Fig. 3 is a ylongitudinal sectional view of one end of the roll of Figs. 1 and 2; Figs. 4 and 5 'are transverse sectional views of modified forms lof the roll; and Fig. 6 is a longitudinal sectional view of the end of the roll of Fig. 4. I v

Referring to the drawing, the numeral 1 indicates a longitudinal bushing or sleeve through which the shaft 2 passes and to which it is secured by .a key, or in any suitable or well known way. The sleeve 1 is provided on its cylindrical' surfacel with a series of longitudinal ridges v or langesf 3 forming ribs which taper inward toward the y center, or in other words are in the shape of a dovetail. The 'grooves 4 formed between the ridges 3 are preferably wider at one end than at the other and are adapted to receive similarly shaped flanges or lugs 5,

carried on the inner side of the rubber sections 6, which constitute the surface of the roll. The rubber sections 6 are also tapered and are arranged alternately with their 'wider ends at' opposite ends of the roll, as

clearly shown in Fig. 1. Disks 7 are placed upon the shaft 2 for the purpose of holding the longitudinal strips 6 in position and the disks may be retained upon the shaft 2 in any ,suitable way,.such as by split collars 8 entering grooves in the shaft andattached to the disks 7 by screws.v

Y In Fig. 4 I have shown a form of the roll in which the retaining ribs for the rubber strips is in the-form of triangular bars 9, the inner angles of which tit into corresponding grooves in the surface of the sleeve 10. The bars 9 are secured to the end disks 11 by -being reduced to cylindrical formand screw threaded as at 12. The screw thread'- ed portions pass through holes in the disks l1 which are held inpo-sition by nuts 13 and tend to compress the strips longitudinally. The rubber strips are preferably made tapering as in the lform of the roll first described.

In Fig. 5 I have shown the retaining ribs in the form of cylindrical rods '14 which engage semi-cylindrical grooves in the adjacent sides of the taperingrubber strips. It is obvious that these rods maybe' made rectangular if preferred. It should be noted that the joints between 4the rubber strips are not parallel with the axis of the roll but are inclined` or situated helically in relation thereto. This 4arrangement prevents the pressure of an opposing roll from acting uponthe joint except for a small portion of Vits length and obviates any tendency ofthe strips to separate orthe joints to open.

Rolls constructed as above described, not only consist'of no more parts than a lroll made up of a series of disks clamped together, but also lastfor a longer time, as there are fewe`r`joints' and corners to become worn. It will also be seen that any one of the strips may be removed and inserted by displacing one of the end disks yand withdrawing said strip .without disturbing the position of the others. This is not possible in a roller- Inade up'of a series of transversejdisks clamped together, as all of the disks from-one end, up to the disk to be -replaced, must be first removed. The tapering formu of the strips enables all of the piec to be. firmly wedged together, thereby placing the surface of the roll under considerable compression, so that the joints between the longitudinally of the roll `and continuously strips are irmly closed. The fact that the joints between the strips. extend diagonally and longitudinally of the roll, renders Ythe joints less liable to separate and thereby catch and retain bers of the material kbeing treatedor other foreign matter.

Having thus 'described these examples of embodiments of my invention, I do not wish to be understood as being limited vto the details of form and arrangement of parts herein setforth, forV various changes may be made by those skilled in the art without departing from the spiritl and scope of my invention. l

' Havingtlius described my invention, what I claim and desire to protect by Letters Patent is:

1. A roll having a continuous elastic surface under circumferential compression, said surface comprising a series of longitudinal strips of elastic, compressible material, a rigid core, and means on the core extending the elastic retaining said strips in4 from one end to the other within portion thereof for position. j l

2. A roll having a continuous elastic sur face, saidl surface comprising a series of laterally :contacting longitudinal strips of elastic, compressible material, a rigid core,

and means for compressing said strips about said core circumferentially of the roll.

3.- A roll comprising a series of longitudinal tapering strips of elastic, compressible material and means carried by the body of said roll and located within the rubber portion thereof for retaining said strips in position.

4. A roll comprising a series of longitudinal tapering strips of elastic, compres-l sible material and means located between the sides thereof for retaining the same in position. 4

5. A roll-having a continuous elastic surlface 'Y under circumferential compression, comprising a series of longitudinal strips of elastic, com ressible material, a rigid core and longitu inalparts extending from one end to the other of the roll and located between said strips within said surface for retainingsaid strips in position on said core.

6. A roll com rising a 'series of longitudinal strips, o elastic, compressible material the-joints between said strips extending diagonally' or helically in relation to the axis of said roll.

y7. A roll comprising a series of longitudinal tapering strips of elastic, compressible material and retaining ribs located between said strips and extending diagonally in relation to the axis of said roll. l

l8. A roll comprising a'series of longitudinal taperingstrips, of elastic, compressible material a sleeve upon which said strips are mounted, ribscarried by said roll and adapted toretain the bottom of said strips between them.

9. A roll comprising a -series of longitudinal tapering strips of elastic, compressible material having longitudinal dovetailedprojections and a sleeve having longitudinal dovetailed ribs coperating with said projections on said strips to hold the latter in position.

10. A roll comprising la series of longitudinal tapering strips of elastic, compressible material having dovetailed projections or flanges on their inner sides, a sleeve having corresponding dovetailed projections or ianges on its periphery, a shaft passing through, said sleeve,` and disks carried by said shaft and contacting with the ends of said strips to hold the latter in position longitudinally.

Signed this 27th Witnesses: A

' H. RICHARD CooBsE, ,E. W. HEMPHILL.

day of'.May, 1909. IRA F. BURNHAM. 

